Treating vulcanized oils



- yields a product which appears to have all the properties of the original material. The

Patented hpr. l 1930.

a las U ITED srlarss- PATENTQFFWE AISLES! F. OF JACKSON HEIGHTS, NEW YORK, ASSIGNOB TO THE NAUG-ATUCK CHEMICAL COMPANY, OF NAUGATUCK, CONNECTICUT, A CCRPORATION 01 CCENECT- IC'UT TREATING VULCANIZED (inns No Drawing. Application filed Qctober 1 This invention relates to processes of treating vulcanized oils known as factice or rubber substitute or other similar materials and to the products obtained thereby. It is more particularly directed to a process for forming a dispersion of factice and to the resultant dispersion. l f

It has been known that rubber or shoddies either compounded or uncompounded can be dispersed in a non-solvent medium.

The vulcanized oils have long been used in the mill type of rubber compounds, particu larly'in cheap stocks such as erasers, where a highly compounded stock is desired which will at the same time be elasticand, rubber like. The customary way of adding the rubber substitute to the rubber has been by mixing them together on the mill. This method is not, however, always practigable as jor use,a;rpbber;.substitutedm e mafia ew w ber substitute with latex or other dispersion of rubber and then use the resultant dispersed mixture as such.

An object of my invention is to disperse factice in water so that the articles of rubber subs'tituterare held in ame state of suspension.

Another object of my invention is to so condition factice that it may be compounded with a rubber dispersion such as latex.

With these and other objects in view my invention consists broadly in mixing factice with dispersing agents and a non-solvent such as water, until a dispersion of the fa'ctice is obtained. Such a dispersion when dried invention consists further in subsequently mim'ng the dispersed factice, in varying amounts, with a cured or uncured rubber dispersion such as either natural or artificial latices. I I t a To illustrate this invention by means of a specific example, the procedure is as follows: Into a suitable mixer, such as a Werner 8r,

1925. Serial No. 139,019.

the continuous phase changes to water.

A suitable formula for such 'a dispersion may be as follows:

white substitute 500 parts by weight 25par'ts by weight Karaya gum 15 parts by weight saponin 500 parts by weight water.

In carrying out the invention, I prefer to examplqifit'isdsiredtii'tioiiipoundtlie mt ""'fi1aaaed oil. This is the compound obtained by heating various glycerideoils with sulphur or its compounds. Examples of such oils are corn, cotton seed, rape seed and linseed; The oils, so treated may be either raw or blown and they may be treated with sulphur alone or with a sulphur compound such as sulphur chloride. Sulphur chloride yields a light colored product known as white substitute, and either these or the darker colored compounds obtained by treating with sulphur can be used in my invention.' These rubber V Pfleiderer, I place a quantity of white suba stitute. Heat is applied and the batch mixed or masticated for ,a period of a few minutes until the rubber substitute softens to a plastic condition. Dispersion agents'are then added substitutes areinsoluble in most organic s01,

vents. and in water, and in general inert chemically.

The Karaya gum and saponin may be re I placed with more or less satisfactory results by other dispersing agents vsuch. as glue-"f casein, sllurian shale, chma clay, soaps and"v substances of a similar nature. It is oi c ourse',

understood that the materials used in obtaiiiing'the dispersions may be varied inpercentage as well as in number and kindi: The amount of water addedafter the paste-has broken may be varied according to whether a. thick paste of dispersed. factlce or a thin ivent liquid may be used ifdesired. Preferably such liquid is used as will mix with water. If it is desired to compound pigments with the factice they may be mixed with it e5 latex-like productis desired. -Other non-soleither prior to or along with the dispersing agents. The step-of m xing and heating the factice to soften it may be omitted.

- The product obtained by this process is a Unvulcauized latex fl fl by Rubber as ammoxiia preserved latex containing I 33% soli 100 100 100 White rubber substitute (as water dispersion containing 48% factice) 50 150 150 Gilder's whitinv 150 Added water 150 Part of Vulcanized latex solids by weight Rubber as cured latex containing 33% solids 100 White rubber substitute (as water dispersion containing 48% Iactice) 50 It is possible to incprporate with the latex 35 and. factice any desired compounding ingredient such as clays and other fillers, and Yulcanizing ingredients such as sulphur, accelerators and accelerating combinations. Instead of natural latex artificial dispersions of rubber may be used.

Dried films of these mixes are rubbery, have good strength and are quite transparent. The film containing partsof the .factice on 100 of rubber as latex upon being heated for as 45 long a time as 36 hours' at 175 F. does not.

tice in which water Having thus described my invention what I claim and desire to protect by Letters l atent 1. Theprocess of dispersingrubber substitute in water which comprises softening a mass of white substitute by heat and mastication, directly thereafter incorporating Karaya gum and saponin therewith and agitating the mixture with gradual addition of water. until the white substitute is dispersed in the water.

2. The method of incorporating factice into an aqueous dispersion or rubber which coniprises dispersing the factice in a water miscible liquid and mixing the dispersion of factice with an aqueous dispersion of rubber.

3. The method of incorporating factice into latex which comprises mixing the factice with a dispersion agent, dispersing the mixture in water, and mixing the aqueous dlspersion of the facti'ce with latex.

4. The method of incorporating factice' into latex which comprises'dispersing the factice, compounding material and a dispersion agent in water and mixing the product with latex.

5. As a new product, a stableaqueous dispersion of rubber containing dispersed facconstitutes a continuous phase.

6. As a new product,a stable aqueous dispersion of rubber containing dispersed conipounded factice in which water constitutes a v continuous phase. a f

7 As a new product, a latex containing dispersed factice.

Signed at New York, county. of New-York, State of NewYork, this 28thday of September, 1926. a

ALLEN-F. OWEN.

become tacky or apparently lose any strength;

These rubber substitute dispersions are of value in latex compounding inasmuch as they.

give a product of rubber-like qualities even J 30 when highly compounded as contrasted with the non-elastic properties of highly cornpounded latex containing inelastic fillers only. Some of the uses to which the dispersion in the latex compounds may be put are, for

:5 grease and water-proof coatings, adhesives,

spread goods backing compounds for carpets,

the impregnation of upholstery materials for furniture, and for latex paper made inthe beater. In fact, it can be used in almost all 50 of the present applications of latex.

The term rubber substitute as used in the claims is meant to include materials generally comprehended by factice or vulcanized oil.

The term latex is meant to include both 65 natural and artificial latices. 

